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Friend function

Hi , can anyone explain how to define friend function when separating files for classes? In my header file I have friend f() inside the class and in cpp file I have a mistake “invalid specifier outside a class declaration “ Thanks

12/18/2018 2:50:06 PM


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It helps to put your code into the playground and link it to your post so we can see your issue. Without that there are so many possibilities that I don't know where to begin.